247期：→№←【04,05,07,08,09,11,12,13,15,17,20,21,26,27,28,29,31,32,37,39,40,43,46,49】开：29对
248期：→№←【01,02,04,05,06,09,11,14,19,22,23,25,26,28,31,32,34,35,37,39,42,43,45,46】开：15错
249期：→№←【01,03,05,06,09,11,14,19,20,23,25,26,28,30,31,32,33,37,38,39,40,42,43,45】开：**